Study of the pygmy dipole resonance with hadronic and electromagnetic probes

A. Endres; A. Zilges; E. Litvinova; D. Savran; P. A. Butler; R. -D. Herzberg; M. N. Harakeh; V. I. Stoica; H. J. Wortche; S. Harissopulos; A. Lagoyannis; R  Krucken; P. Ring; N. Pietralla; V. Yu. Ponomarev; Marcus Scheck; K. Sonnabend; L. Popescu

doi:10.1142/9789814383646_0069

Study of the pygmy dipole resonance with hadronic and electromagnetic probes

A. Endres, A. Zilges, E. Litvinova, D. Savran, P. A. Butler, R. -D. Herzberg, M. N. Harakeh, V. I. Stoica, H. J. Wortche, S. Harissopulos, A. Lagoyannis, R Krucken, P. Ring, N. Pietralla, V. Yu. Ponomarev, Marcus Scheck, K. Sonnabend, L. Popescu

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The structure of the pygmy dipole resonance has been investigated in the nuclei 140Ce, 138Ba, 124Sn, and 94Mo by performing experiments using different probes. On the one hand, real-photon scattering experiments have been conducted using the nuclear resonance fluorescence (NRF) method. On the other hand, α-scattering experiments have been done using the (α, α′, γ) coincidence technique. An unexpected difference in the excitation cross sections of the dipole strength below the particle threshold has been observed. While a group of PDR states could be excited in both kinds of experiments, a group of energetically higher-lying states could only be excited in NRF. In order to understand this phenomenon, theoretical calculations using the quasiparticle-phonon model (QPM) and the relativistic quasiparticle time-blocking approximation (RQTBA) have been performed for the nucleus 124Sn. A possible explanation for the observed splitting was found.

Original language	English
Title of host publication	Capture Gamma-Ray Spectroscopy and Related Topics
Subtitle of host publication	Proceedings of the Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011
Publisher	World Scientific Publishing Co Pte Ltd
ISBN (Electronic)	978-981-4513-83-8
ISBN (Print)	978-981-4383-63-9
DOIs	https://doi.org/10.1142/9789814383646_0069
Publication status	Published - 2011
Externally published	Yes
Event	Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011 - Guelph, Canada Duration: 28 Aug 2011 → 2 Sept 2011

Conference

Conference	Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011
Country/Territory	Canada
City	Guelph
Period	28/08/11 → 2/09/11

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10.1142/9789814383646_0069

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Endres, A., Zilges, A., Litvinova, E., Savran, D., Butler, P. A., Herzberg, R. .-D., Harakeh, M. N., Stoica, V. I., Wortche, H. J., Harissopulos, S., Lagoyannis, A., Krucken, R., Ring, P., Pietralla, N., Ponomarev, V. Y., Scheck, M., Sonnabend, K., & Popescu, L. (2011). Study of the pygmy dipole resonance with hadronic and electromagnetic probes. In Capture Gamma-Ray Spectroscopy and Related Topics: Proceedings of the Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011 World Scientific Publishing Co Pte Ltd. https://doi.org/10.1142/9789814383646_0069

@inproceedings{ed3f625ccd6d492d9f55f57307629903,

title = "Study of the pygmy dipole resonance with hadronic and electromagnetic probes",

abstract = "The structure of the pygmy dipole resonance has been investigated in the nuclei 140Ce, 138Ba, 124Sn, and 94Mo by performing experiments using different probes. On the one hand, real-photon scattering experiments have been conducted using the nuclear resonance fluorescence (NRF) method. On the other hand, α-scattering experiments have been done using the (α, α′, γ) coincidence technique. An unexpected difference in the excitation cross sections of the dipole strength below the particle threshold has been observed. While a group of PDR states could be excited in both kinds of experiments, a group of energetically higher-lying states could only be excited in NRF. In order to understand this phenomenon, theoretical calculations using the quasiparticle-phonon model (QPM) and the relativistic quasiparticle time-blocking approximation (RQTBA) have been performed for the nucleus 124Sn. A possible explanation for the observed splitting was found.",

author = "A. Endres and A. Zilges and E. Litvinova and D. Savran and Butler, {P. A.} and Herzberg, {R. -D.} and Harakeh, {M. N.} and Stoica, {V. I.} and Wortche, {H. J.} and S. Harissopulos and A. Lagoyannis and R Krucken and P. Ring and N. Pietralla and Ponomarev, {V. Yu.} and Marcus Scheck and K. Sonnabend and L. Popescu",

year = "2011",

doi = "10.1142/9789814383646_0069",

language = "English",

isbn = "978-981-4383-63-9 ",

booktitle = "Capture Gamma-Ray Spectroscopy and Related Topics",

publisher = "World Scientific Publishing Co Pte Ltd",

address = "Singapore",

note = "Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011 ; Conference date: 28-08-2011 Through 02-09-2011",

}

Endres, A, Zilges, A, Litvinova, E, Savran, D, Butler, PA, Herzberg, R-D, Harakeh, MN, Stoica, VI, Wortche, HJ, Harissopulos, S, Lagoyannis, A, Krucken, R, Ring, P, Pietralla, N, Ponomarev, VY, Scheck, M, Sonnabend, K & Popescu, L 2011, Study of the pygmy dipole resonance with hadronic and electromagnetic probes. in Capture Gamma-Ray Spectroscopy and Related Topics: Proceedings of the Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011. World Scientific Publishing Co Pte Ltd, Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011, Guelph, Canada, 28/08/11. https://doi.org/10.1142/9789814383646_0069

Study of the pygmy dipole resonance with hadronic and electromagnetic probes. / Endres, A.; Zilges, A.; Litvinova, E. et al.
Capture Gamma-Ray Spectroscopy and Related Topics: Proceedings of the Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011. World Scientific Publishing Co Pte Ltd, 2011.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Study of the pygmy dipole resonance with hadronic and electromagnetic probes

AU - Endres, A.

AU - Zilges, A.

AU - Litvinova, E.

AU - Savran, D.

AU - Butler, P. A.

AU - Herzberg, R. -D.

AU - Harakeh, M. N.

AU - Stoica, V. I.

AU - Wortche, H. J.

AU - Harissopulos, S.

AU - Lagoyannis, A.

AU - Krucken, R

AU - Ring, P.

AU - Pietralla, N.

AU - Ponomarev, V. Yu.

AU - Scheck, Marcus

AU - Sonnabend, K.

AU - Popescu, L.

PY - 2011

Y1 - 2011

N2 - The structure of the pygmy dipole resonance has been investigated in the nuclei 140Ce, 138Ba, 124Sn, and 94Mo by performing experiments using different probes. On the one hand, real-photon scattering experiments have been conducted using the nuclear resonance fluorescence (NRF) method. On the other hand, α-scattering experiments have been done using the (α, α′, γ) coincidence technique. An unexpected difference in the excitation cross sections of the dipole strength below the particle threshold has been observed. While a group of PDR states could be excited in both kinds of experiments, a group of energetically higher-lying states could only be excited in NRF. In order to understand this phenomenon, theoretical calculations using the quasiparticle-phonon model (QPM) and the relativistic quasiparticle time-blocking approximation (RQTBA) have been performed for the nucleus 124Sn. A possible explanation for the observed splitting was found.

AB - The structure of the pygmy dipole resonance has been investigated in the nuclei 140Ce, 138Ba, 124Sn, and 94Mo by performing experiments using different probes. On the one hand, real-photon scattering experiments have been conducted using the nuclear resonance fluorescence (NRF) method. On the other hand, α-scattering experiments have been done using the (α, α′, γ) coincidence technique. An unexpected difference in the excitation cross sections of the dipole strength below the particle threshold has been observed. While a group of PDR states could be excited in both kinds of experiments, a group of energetically higher-lying states could only be excited in NRF. In order to understand this phenomenon, theoretical calculations using the quasiparticle-phonon model (QPM) and the relativistic quasiparticle time-blocking approximation (RQTBA) have been performed for the nucleus 124Sn. A possible explanation for the observed splitting was found.

U2 - 10.1142/9789814383646_0069

DO - 10.1142/9789814383646_0069

M3 - Conference contribution

SN - 978-981-4383-63-9

BT - Capture Gamma-Ray Spectroscopy and Related Topics

PB - World Scientific Publishing Co Pte Ltd

T2 - Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011

Y2 - 28 August 2011 through 2 September 2011

ER -

Endres A, Zilges A, Litvinova E, Savran D, Butler PA, Herzberg RD et al. Study of the pygmy dipole resonance with hadronic and electromagnetic probes. In Capture Gamma-Ray Spectroscopy and Related Topics: Proceedings of the Fourteenth International Symposium Guelph, Canada, 28 August – 2 September 2011. World Scientific Publishing Co Pte Ltd. 2011 doi: 10.1142/9789814383646_0069

Study of the pygmy dipole resonance with hadronic and electromagnetic probes

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